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Java example source code file (gcTraceSend.cpp)

This example Java source code file (gcTraceSend.cpp) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

eventgcparallelold, g1newtracer\:\:send_g1_young_gc_event, gcheapsummaryeventsender, gcid, gcwhen\:\:type, include_all_gcs, need, phasesender, spacesummary, tracestructcopyfailed, tracestructmetaspacesizes, tracestructobjectspace, tracestructvirtualspace, virtualspacesummary

The gcTraceSend.cpp Java example source code

/*
 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

#include "precompiled.hpp"
#include "gc_implementation/shared/gcHeapSummary.hpp"
#include "gc_implementation/shared/gcTimer.hpp"
#include "gc_implementation/shared/gcTrace.hpp"
#include "gc_implementation/shared/gcWhen.hpp"
#include "gc_implementation/shared/copyFailedInfo.hpp"
#include "runtime/os.hpp"
#include "trace/tracing.hpp"
#include "trace/traceBackend.hpp"
#if INCLUDE_ALL_GCS
#include "gc_implementation/g1/evacuationInfo.hpp"
#include "gc_implementation/g1/g1YCTypes.hpp"
#endif

// All GC dependencies against the trace framework is contained within this file.

typedef uintptr_t TraceAddress;

void GCTracer::send_garbage_collection_event() const {
  EventGCGarbageCollection event(UNTIMED);
  if (event.should_commit()) {
    event.set_gcId(_shared_gc_info.id());
    event.set_name(_shared_gc_info.name());
    event.set_cause((u2) _shared_gc_info.cause());
    event.set_sumOfPauses(_shared_gc_info.sum_of_pauses());
    event.set_longestPause(_shared_gc_info.longest_pause());
    event.set_starttime(_shared_gc_info.start_timestamp());
    event.set_endtime(_shared_gc_info.end_timestamp());
    event.commit();
  }
}

void GCTracer::send_reference_stats_event(ReferenceType type, size_t count) const {
  EventGCReferenceStatistics e;
  if (e.should_commit()) {
      e.set_gcId(_shared_gc_info.id());
      e.set_type((u1)type);
      e.set_count(count);
      e.commit();
  }
}

void ParallelOldTracer::send_parallel_old_event() const {
  EventGCParallelOld e(UNTIMED);
  if (e.should_commit()) {
    e.set_gcId(_shared_gc_info.id());
    e.set_densePrefix((TraceAddress)_parallel_old_gc_info.dense_prefix());
    e.set_starttime(_shared_gc_info.start_timestamp());
    e.set_endtime(_shared_gc_info.end_timestamp());
    e.commit();
  }
}

void YoungGCTracer::send_young_gc_event() const {
  EventGCYoungGarbageCollection e(UNTIMED);
  if (e.should_commit()) {
    e.set_gcId(_shared_gc_info.id());
    e.set_tenuringThreshold(_tenuring_threshold);
    e.set_starttime(_shared_gc_info.start_timestamp());
    e.set_endtime(_shared_gc_info.end_timestamp());
    e.commit();
  }
}

void OldGCTracer::send_old_gc_event() const {
  EventGCOldGarbageCollection e(UNTIMED);
  if (e.should_commit()) {
    e.set_gcId(_shared_gc_info.id());
    e.set_starttime(_shared_gc_info.start_timestamp());
    e.set_endtime(_shared_gc_info.end_timestamp());
    e.commit();
  }
}

static TraceStructCopyFailed to_trace_struct(const CopyFailedInfo& cf_info) {
  TraceStructCopyFailed failed_info;
  failed_info.set_objectCount(cf_info.failed_count());
  failed_info.set_firstSize(cf_info.first_size());
  failed_info.set_smallestSize(cf_info.smallest_size());
  failed_info.set_totalSize(cf_info.total_size());
  return failed_info;
}

void YoungGCTracer::send_promotion_failed_event(const PromotionFailedInfo& pf_info) const {
  EventPromotionFailed e;
  if (e.should_commit()) {
    e.set_gcId(_shared_gc_info.id());
    e.set_data(to_trace_struct(pf_info));
    e.set_thread(pf_info.thread()->thread_id());
    e.commit();
  }
}

// Common to CMS and G1
void OldGCTracer::send_concurrent_mode_failure_event() {
  EventConcurrentModeFailure e;
  if (e.should_commit()) {
    e.set_gcId(_shared_gc_info.id());
    e.commit();
  }
}

#if INCLUDE_ALL_GCS
void G1NewTracer::send_g1_young_gc_event() {
  EventGCG1GarbageCollection e(UNTIMED);
  if (e.should_commit()) {
    e.set_gcId(_shared_gc_info.id());
    e.set_type(_g1_young_gc_info.type());
    e.set_starttime(_shared_gc_info.start_timestamp());
    e.set_endtime(_shared_gc_info.end_timestamp());
    e.commit();
  }
}

void G1NewTracer::send_evacuation_info_event(EvacuationInfo* info) {
  EventEvacuationInfo e;
  if (e.should_commit()) {
    e.set_gcId(_shared_gc_info.id());
    e.set_cSetRegions(info->collectionset_regions());
    e.set_cSetUsedBefore(info->collectionset_used_before());
    e.set_cSetUsedAfter(info->collectionset_used_after());
    e.set_allocationRegions(info->allocation_regions());
    e.set_allocRegionsUsedBefore(info->alloc_regions_used_before());
    e.set_allocRegionsUsedAfter(info->alloc_regions_used_before() + info->bytes_copied());
    e.set_bytesCopied(info->bytes_copied());
    e.set_regionsFreed(info->regions_freed());
    e.commit();
  }
}

void G1NewTracer::send_evacuation_failed_event(const EvacuationFailedInfo& ef_info) const {
  EventEvacuationFailed e;
  if (e.should_commit()) {
    e.set_gcId(_shared_gc_info.id());
    e.set_data(to_trace_struct(ef_info));
    e.commit();
  }
}
#endif

static TraceStructVirtualSpace to_trace_struct(const VirtualSpaceSummary& summary) {
  TraceStructVirtualSpace space;
  space.set_start((TraceAddress)summary.start());
  space.set_committedEnd((TraceAddress)summary.committed_end());
  space.set_committedSize(summary.committed_size());
  space.set_reservedEnd((TraceAddress)summary.reserved_end());
  space.set_reservedSize(summary.reserved_size());
  return space;
}

static TraceStructObjectSpace to_trace_struct(const SpaceSummary& summary) {
  TraceStructObjectSpace space;
  space.set_start((TraceAddress)summary.start());
  space.set_end((TraceAddress)summary.end());
  space.set_used(summary.used());
  space.set_size(summary.size());
  return space;
}

class GCHeapSummaryEventSender : public GCHeapSummaryVisitor {
  GCId _id;
  GCWhen::Type _when;
 public:
  GCHeapSummaryEventSender(GCId id, GCWhen::Type when) : _id(id), _when(when) {}

  void visit(const GCHeapSummary* heap_summary) const {
    const VirtualSpaceSummary& heap_space = heap_summary->heap();

    EventGCHeapSummary e;
    if (e.should_commit()) {
      e.set_gcId(_id);
      e.set_when((u1)_when);
      e.set_heapSpace(to_trace_struct(heap_space));
      e.set_heapUsed(heap_summary->used());
      e.commit();
    }
  }

  void visit(const PSHeapSummary* ps_heap_summary) const {
    visit((GCHeapSummary*)ps_heap_summary);

    const VirtualSpaceSummary& old_summary = ps_heap_summary->old();
    const SpaceSummary& old_space = ps_heap_summary->old_space();
    const VirtualSpaceSummary& young_summary = ps_heap_summary->young();
    const SpaceSummary& eden_space = ps_heap_summary->eden();
    const SpaceSummary& from_space = ps_heap_summary->from();
    const SpaceSummary& to_space = ps_heap_summary->to();

    EventPSHeapSummary e;
    if (e.should_commit()) {
      e.set_gcId(_id);
      e.set_when((u1)_when);

      e.set_oldSpace(to_trace_struct(ps_heap_summary->old()));
      e.set_oldObjectSpace(to_trace_struct(ps_heap_summary->old_space()));
      e.set_youngSpace(to_trace_struct(ps_heap_summary->young()));
      e.set_edenSpace(to_trace_struct(ps_heap_summary->eden()));
      e.set_fromSpace(to_trace_struct(ps_heap_summary->from()));
      e.set_toSpace(to_trace_struct(ps_heap_summary->to()));
      e.commit();
    }
  }
};

void GCTracer::send_gc_heap_summary_event(GCWhen::Type when, const GCHeapSummary& heap_summary) const {
  GCHeapSummaryEventSender visitor(_shared_gc_info.id(), when);
  heap_summary.accept(&visitor);
}

static TraceStructMetaspaceSizes to_trace_struct(const MetaspaceSizes& sizes) {
  TraceStructMetaspaceSizes meta_sizes;

  meta_sizes.set_capacity(sizes.capacity());
  meta_sizes.set_used(sizes.used());
  meta_sizes.set_reserved(sizes.reserved());

  return meta_sizes;
}

void GCTracer::send_meta_space_summary_event(GCWhen::Type when, const MetaspaceSummary& meta_space_summary) const {
  EventMetaspaceSummary e;
  if (e.should_commit()) {
    e.set_gcId(_shared_gc_info.id());
    e.set_when((u1) when);
    e.set_metaspace(to_trace_struct(meta_space_summary.meta_space()));
    e.set_dataSpace(to_trace_struct(meta_space_summary.data_space()));
    e.set_classSpace(to_trace_struct(meta_space_summary.class_space()));
    e.commit();
  }
}

class PhaseSender : public PhaseVisitor {
  GCId _gc_id;
 public:
  PhaseSender(GCId gc_id) : _gc_id(gc_id) {}

  template<typename T>
  void send_phase(PausePhase* pause) {
    T event(UNTIMED);
    if (event.should_commit()) {
      event.set_gcId(_gc_id);
      event.set_name(pause->name());
      event.set_starttime(pause->start());
      event.set_endtime(pause->end());
      event.commit();
    }
  }

  void visit(GCPhase* pause) { ShouldNotReachHere(); }
  void visit(ConcurrentPhase* pause) { Unimplemented(); }
  void visit(PausePhase* pause) {
    assert(PhasesStack::PHASE_LEVELS == 5, "Need more event types");

    switch (pause->level()) {
      case 0: send_phase<EventGCPhasePause>(pause); break;
      case 1: send_phase<EventGCPhasePauseLevel1>(pause); break;
      case 2: send_phase<EventGCPhasePauseLevel2>(pause); break;
      case 3: send_phase<EventGCPhasePauseLevel3>(pause); break;
      default: /* Ignore sending this phase */ break;
    }
  }
};

void GCTracer::send_phase_events(TimePartitions* time_partitions) const {
  PhaseSender phase_reporter(_shared_gc_info.id());

  TimePartitionPhasesIterator iter(time_partitions);
  while (iter.has_next()) {
    GCPhase* phase = iter.next();
    phase->accept(&phase_reporter);
  }
}

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